can’t recv LLCC68 message

[11tools]

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I use hackrf and plutosdr make this. Both. Them can't recv LLCC68 mod

[tapparelj]

Hello @11tools,

from your screenshot I can't notice anything strange, therefore, I would guess that there is a configuration mismatch between the transmitter and receiver. So here are a few questions:

• Is the tx_rx_functionality_check.grc flowgraph working?
• is the frame visible on the waterfall sink? (using a larger spreading factor may help seeing it)
• what is the sync word used by your module? (cf datasheets)
  
• If you save the samples you receive in a file and then plot their instantaneous frequency can you see the chirps (when the transmitter is close to your receiver to get a large SNR)?

[11tools]

Hello @tapparelj .

Thanks . I changed the Spreading factor to 8,9,10,11,12... still failed no message. maybe the sync word is difference

I had made a flow with Lora Tx and a Lora Rx on PlutoSDR. it can recv message what Lora Tx send.

My real goal is use gr-lora_sdr to recv startlink 150M Lora signal. because 150M lora module is hard to buy.

have anyone try this?